I have a P4M890T-M2 motherboard. When i start my computer my monitor goes blank and two lights on my tower blink -- short blink long blink-- over and over. i do not believe this MB has a place for a speaker. My CPU fan turns on when my computer does.

First test your CPU then tast all leads that are attached to your hard drive sounds like a faulty lead of some sorts thentry replacing all the leads that attach to your hard drive including electrical extensions + IDE,SATA and the ones that attach from your motherboard to hard drive

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Hello,As mentioned that when you turn on the system the lights on the system turns on and the monitor goes off, unplug the VGA cable from the system tower and turn on the monitor and check if you get signals on the screen if it shows you some color bar or a massage, that means your monitor is good. IF not then there is problem with the monitor . get it repaired or replace it. If that is not the case you would need to unplug all the external devices connected to the tower and try, IF not then you need to open the tower and check for the green light on the motherboard if it comes on or you can try reseting the memory card or if you have an video card, then you will have to remove the card and try the build in one .RegardsSamson ved

How's the status light of your computer monitor? is it blinking amber? and the status light of your computer tower's power button? blinking amber as well or solid green or no light at all?

1. Disconnect all the connection at the back of your computer tower2. Press the power button of the computer tower for 15 seconds 3. Reconnect the power button and the monitor cable at the back of your computer tower and turn on the computer (if it turned on that means that one of the device plugged at the back of your computer tower is faulty)4. If still the same problem, open up your computer tower. 5. Reseat the video card, Reseat Hard drive, Reseat Memory, Reseat CPU, Reseat power cord coming from the CPU to your computer (doing all things one-by-one to pin-point the root cause of the issue)

If none of the troubleshooting steps fixed the problem, possible that the power supply is faulty and if the power supply is faulty sometimes it goes with the motherboard.

Reason 1: Wetness
The number one reason why computer monitors go blank is - wetness. Believe it or not, when your computer monitor is exposed to humid air, sometimes water can condense and accumulate in the monitor. This causes the monitor to malfunction and go blank. I've had this happen to my desktop PC at least three times before. What you need to do is to leave the monitor alone for some time and allow the water to evaporate. That usually solves the problem.

Reason 2: Faulty Graphics Card
The next reason why your computer monitor goes black is due to a faulty graphics card. The best way to detect this kind of problem is to connect up a new monitor to your PC, then check if you have a blank screen. If you continue to have a blank screen, then it's likely your video card is faulty.

Reason 3: Faulty RAM
This one is less obvious and less common, but it can happen. You might sometimes get bad RAM modules which prevent your PC from booting up even to the basic BIOS startup screen. To detect this kind of problem is more troublesome, you might need to remove those RAM modules and insert them into another computer.

Reason 4: Loose Connections
Another reason why your monitor goes blank is due to loose connections. The connection from the monitor to the mains is usually a culprit, as is the connection between the monitor and the video card. Check those connections before you declare your computer monitor as faulty.

Reason 5: A Short Circuit In The Motherboard
And the final reason why your computer monitor goes blank? It's possibly because of a short circuit in the motherboard. This is the most undesirable outcome of course, as you might have to replace your entire motherboard. However, it's possible that this can happen - so keep your fingers crossed and hope it doesn't happen to you.
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HOw about the light on the tower? if its stedy green then the tower is ok then run a self test on monitor if it passes the monitor is also ok then unplug the power cable from the monitor and data cable also and press and hold the power button for 10 sec and then connect the monitor to the system

Do a power drain :- Disconnect every cord from the back of computer tower while the pc is oiff and then press and hold down the power supply button in front of the tower..
have u tried updating the bios any time before?
Secondly,is it possible to go to the safe mode or the screen goes blank even before that?

If it is flashing on the monitor, then it might be tht the monitor is not gettign signal from the tower.
To check, disconnect the monitor from the tower and check the monitor. If you get a msg on the screen like no input signal or check video cable, then 99% monitor is fine.

Check for the power supply light at the back of the tower.

Disconnect everything from the computer and then press and hold the power button on the comp for about 30 seconds.